A man fires a bullet of mass 200 g at speed 5 m s⁻¹. The gun has mass 1 kg. Find backward recoil speed of the gun.
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A man fires a bullet of mass 200 g at speed 5 m s⁻¹. The gun has mass 1 kg. Find backward recoil speed of the gun.

G1 Physics · Accepted Answer

Initially total momentum is zero. After firing 0.20×5+1×vᵍ=0, so vᵍ=−1 m s⁻¹. Its recoil speed is 1 m s⁻¹. Answer: A.